Forest Research Institut Baden-Württemberg (FVA)
Department of forest economics
Tel: +49 761 4018 231
Fax: +49 761 4018 333
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|Click here to download the Spanish translation part II (PDF-file)|
Fig. 1: Schema for determining harvesting methods.
In general, logging is carried out in a highly
mechanised manner. This means that powerful harvesters are used in deciduous as
well as coniferous stands. Crawler harvesters, which normally have required
power reserves, are particularly suitable. Wheel harvesters in higher
engine-power-classes provide satisfactory results. Due to the high accident
risk, cross-cutting should be done by harvesters if existing skid roads can be
For logging in flat territory powerful harvesters are necessary.
|Crawler harvester with tiltable cab.|
|Application of a cable crane on steep slopes.|
In practice crawler excavators have been used to untangle trees, if they have to be cut down using a motor-manual method. Crawler excavators met, to a large extent, work safety requirements. The use of a cable skidder to straighten out windthrow areas is less recommended.
For Baden-Wuerttemberg: Combined methods (System 2) are appropriate for compliance with skid road distances of 40 m.
For Rheinland-Pfalz: The Baden-Wuerttemberg approach is appropriate but only 20-m-skid-road-distances.
Logging is mainly carried out using techniques with a low degree of mechanisation. Useful crawler harvester technology is only available on a small scale and applicable in particular cases.
Cross-cutting is processed using motor-manual methods. Untangling is via cable skidders. Bucking is carried out by a processor or motor-manual bucking takes place at appropriate conversion sites. At windthrown areas no delimbing should be carried out, unless the timber quantity is low.
In general cross-cutting is carried out using motor-manual methods. Untangling and skidding is via cable cranes. Bucking is carried out by a processor or motor-manual bucking takes place at appropriate conversion sites. Storage capacity is the main problem which is resolved by immediate timber removal.